CHEYENNE, Wyo. (AP) — The U.S. Bureau of Land Management is set to auction off the right to mine more than 400 million tons of coal in the Powder River Basin.

The 3,200-acre tract is adjacent to the North Antelope Rochelle Mine operated by Powder River Coal, a subsidiary of Peabody Energy.

The sale was set for Wednesday at the BLM state headquarters in Cheyenne.

The BLM says coal royalties in Wyoming last year totaled $590 million. The state of Wyoming and federal government shared the revenue about equally.